realtimestockdlg.cpp

use activex parser xml

// RealTimeStockDlg.cpp : implementation file
//
/**********************************************************************************
//
// Copyright (C) Dhandapani Ammasai ([e-mail])
//
// This code can be freely used or modified for non commercial use provided that
// this copyright notice and license appear on all copies of the software.
//
**********************************************************************************/

#include "stdafx.h"
#include "RealTimeStock.h"
#include "RealTimeStockDlg.h"
#include "DlgProxy.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRealTimeStockDlg dialog

IMPLEMENT_DYNAMIC(CRealTimeStockDlg, CDialog);

CRealTimeStockDlg::CRealTimeStockDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRealTimeStockDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRealTimeStockDlg)
	m_szSymbol = _T("");
	m_dblPrice = 0.0;
	m_lHttpStatus = 0;
	m_szHttpStatusText = _T("");
	m_szErrorText = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_pAutoProxy = NULL;
}

CRealTimeStockDlg::~CRealTimeStockDlg()
{
	// If there is an automation proxy for this dialog, set
	//  its back pointer to this dialog to NULL, so it knows
	//  the dialog has been deleted.
	if (m_pAutoProxy != NULL)
		m_pAutoProxy->m_pDialog = NULL;
}

void CRealTimeStockDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRealTimeStockDlg)
	DDX_Text(pDX, IDC_SYMBOL, m_szSymbol);
	DDX_Text(pDX, IDC_PRICE, m_dblPrice);
	DDX_Text(pDX, IDC_HTTP_STATUS, m_lHttpStatus);
	DDX_Text(pDX, IDC_HTTP_STATUS_TEXT, m_szHttpStatusText);
	DDX_Text(pDX, IDC_RESULT_ERROR, m_szErrorText);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRealTimeStockDlg, CDialog)
	//{{AFX_MSG_MAP(CRealTimeStockDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CLOSE()
	ON_BN_CLICKED(IDC_GET_PRICE, OnGetPrice)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRealTimeStockDlg message handlers

BOOL CRealTimeStockDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CRealTimeStockDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CRealTimeStockDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CRealTimeStockDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

// Automation servers should not exit when a user closes the UI
//  if a controller still holds on to one of its objects.  These
//  message handlers make sure that if the proxy is still in use,
//  then the UI is hidden but the dialog remains around if it
//  is dismissed.

void CRealTimeStockDlg::OnClose() 
{
	if (CanExit())
		CDialog::OnClose();
}

void CRealTimeStockDlg::OnOK() 
{
	if (CanExit())
		CDialog::OnOK();
}

void CRealTimeStockDlg::OnCancel() 
{
	if (CanExit())
		CDialog::OnCancel();
}

BOOL CRealTimeStockDlg::CanExit()
{
	// If the proxy object is still around, then the automation
	//  controller is still holding on to this application.  Leave
	//  the dialog around, but hide its UI.
	if (m_pAutoProxy != NULL)
	{
		ShowWindow(SW_HIDE);
		return FALSE;
	}

	return TRUE;
}

void CRealTimeStockDlg::OnGetPrice() 
{
	UpdateData();
	if ( !GetStockPriceFromWebServer() )
		m_dblPrice = -1; //Indicates error
	UpdateData(FALSE);
}

BOOL CRealTimeStockDlg::GetStockPriceFromWebServer()
{
	BOOL bRetVal = FALSE;

	try
	{
		MSXML::IXMLHttpRequestPtr HttpRequest;
		HRESULT hResult;
		hResult = HttpRequest.CreateInstance("Microsoft.XMLHTTP");

		if ( FAILED(hResult) )
			return bRetVal; //error 

		VARIANT vAsync;
		vAsync.vt = VT_BOOL;
		vAsync.boolVal = FALSE;
	
		VARIANT vUser;
		vUser.vt = VT_BSTR;
		vUser.bstrVal = NULL;

		VARIANT vPassword;
		vPassword.vt = VT_BSTR;
		vPassword.bstrVal = NULL;

		HttpRequest->open("POST", "http://localhost/GetStockPrice.asp", vAsync, vUser, vPassword);
		HttpRequest->setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

		CString szRequest;
		szRequest = "<RequestStockPrice Symbol='";
		szRequest += m_szSymbol;
		szRequest += "'/>";

		VARIANT vRequest;
		vRequest.vt = VT_BSTR;
		vRequest.bstrVal = szRequest.AllocSysString();

		//Send Http Request
		HttpRequest->send(vRequest);

		//Read response and status
		//
		m_lHttpStatus = HttpRequest->status;
		m_szHttpStatusText = (char*)HttpRequest->statusText;

		_bstr_t bsResponse = HttpRequest->responseText;

		MSXML::IXMLDOMDocumentPtr XMLDom;
		hResult = XMLDom.CreateInstance("Microsoft.XMLDOM");

		if ( FAILED(hResult) )
		{
			HttpRequest->abort();
			return bRetVal;
		}

		//Load response in to XML DOM Tree
		if (!XMLDom->loadXML(bsResponse))
		{
			HttpRequest->abort();
			return bRetVal;
		}


		//Process the response
		MSXML::IXMLDOMNodePtr XMLRootResponseNode = XMLDom->selectSingleNode("ResponseStockPrice");
		if ( XMLRootResponseNode != NULL )
		{
			MSXML::IXMLDOMNodePtr XMLLastTradeNode = XMLRootResponseNode->selectSingleNode("LastTradePrice");

			if ( XMLLastTradeNode != NULL )
			{
				//Yep, we did get the stock price back
				CString szStockPrice((char*)XMLRootResponseNode->text);
				m_dblPrice = atof(szStockPrice);
				m_szErrorText = "OK";
				bRetVal = TRUE;
			}
			else
			{
				//Nope, we didn't get the stock price back
				XMLLastTradeNode = XMLRootResponseNode->selectSingleNode("ErrorMesg");
				if ( XMLLastTradeNode != NULL )
				{
					CString szErrText((char*)XMLRootResponseNode->text);
					m_szErrorText = szErrText;
				}
				bRetVal = FALSE;
			}
		}

		HttpRequest->abort(); //End http session
		long lReadyState = HttpRequest->readyState;
	}
	catch(CException* pException)
	{
		TCHAR szErrMesg[1024];
		pException->GetErrorMessage(szErrMesg, 1024);
		pException->Delete();
		AfxMessageBox(szErrMesg);
	}
	catch(...)
	{
		m_szErrorText = "Make sure your web server is running";
		bRetVal = FALSE;
	}

	return bRetVal;
}